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Finding the Fourth Proportional to 278,799.70, 418,527.60 and 276,831.40

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Solution

The fourth proportional to 278,799.70, 418,527.60 and 276,831.40 is: 415,572.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,799.70 : 418,527.60 = 276,831.40 : x
  2. Step 2: Convert to fraction form
    278,799.70/418,527.60 = 276,831.40/x
  3. Step 3: Cross multiply
    278,799.70x = 418,527.60 × 276,831.40
  4. Step 4: Simplify right side
    278,799.70x = 115,861,581,446.64
  5. Step 5: Solve for x
    x = 115,861,581,446.64/278,799.70
  6. Step 6: Final answer
    x = 415,572.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.